Question : A ball possesses 3000 units of momentum. What would be the ball's new momentum if its velocity was doubled?

Option 1: 3000 units

Option 2: 6000 units

Option 3: 20000 units

Option 4: 9000 units

Question : Which of the following is a scalar quantity?

Option 1: Velocity

Option 2: Force

Option 3: Angular momentum

Option 4: Electrostatic potential

Question : A man in a train moving with a constant velocity drops ball on the platform. The path of the ball as seen by an observer standing on the platform is

Option 1: a straight line

Option 2: a circle

Option 3: a parabola

Option 4: none of these

Question : Rohan and Mohit, together, can build a wall in 8 days. Mohit and Vikas can build the same wall in 10 days and Vikas and Rohan can Build the same wall in 12 days. In how many days can all three complete the same wall while working together?

Option 1: $\frac{240}{37}$

Option 2: $\frac{120}{37}$

Option 3: $\frac{150}{37}$

Option 4: $\frac{180}{37}$

Question : A bullet of mass 'm' and velocity 'a' is fired into a large block of wood of mass 'M'. The final velocity of the system is:

Option 1: $\frac{M}{m + M}a$

Option 2: $\frac{\vec{m}}{ m + M}a$

Option 3: $\frac{m + M}{m}a$

Option 4: $\frac{m + M}{M}a$